AMPX
Amprius Technologies, Inc.Company with tickers: AMPX, AMPX-WT
Market Cap
$1.81B
Shares Outstanding
141,627,170
CIK
1899287
CUSIP
03214Q108
13F Activity (30d)
2 filings
1 filers
Website
Visit website
Investor Relations
Investor relations
Notices of intent to sell restricted or control shares, filed with the SEC on Form 144 by insiders and affiliates. A Form 144 signals a planned sale — it does not confirm the shares were actually sold.
| Filed | Seller | Relationship | Shares | Approx. Sale | Broker |
|---|---|---|---|---|---|
| 2026-06-08 | DIXON DONALD R | Director | 125,000 | 2026-06-08 | The Charles Schwab Corporation |
| 2026-06-04 | THOMAS M STEPIEN | Officer, Director | 2,000 | 2026-06-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | DIXON DONALD R | Director | 17,895 | 2026-05-26 | The Charles Schwab Corporation |
| 2026-04-01 | KANG SUN | Director, Officer | 1,500,000 | 2026-04-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-23 | KANG SUN | Director | 192,727 | 2026-03-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-12 | STEVEN CHU | Board Seat | 155,565 | 2026-03-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-12 | WEN HSUAN HSIEH | Officer, Director | 413,146 | 2026-03-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-10 | STEVEN CHU | Board Seat | 166,632 | 2026-03-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-24 | KANG SUN | Director | 61,251 | 2026-02-23 | Morgan Stanley Smith Barney LLC |
| 2026-02-24 | Stefan Constantin Ionel | Officer | 25,366 | 2026-02-23 | Morgan Stanley Smith Barney LLC |
| 2026-01-21 | Stefan Constantin Ionel | Officer | 717,307 | 2026-01-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-16 | KANG SUN | Director, Officer | 1,018,875 | 2026-01-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-12 | KANG SUN | Director, Officer | 506,267 | 2026-01-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-11 | Stefan Constantin Ionel | Officer | 198,255 | 2025-12-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-25 | Kang Sun | Officer, Director | 68,655 | 2025-11-21 | Morgan Stanley Smith Barney LLC |
| 2025-11-25 | Stefan Constantin Ionel | Officer | 25,024 | 2025-11-21 | Morgan Stanley Smith Barney LLC |
| 2025-11-17 | KANG SUN | Director, Officer | 1,000,000 | 2025-11-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-08-25 | Stefan Constantin Ionel | OFFICER | 19,159 | 2025-08-21 | Morgan Stanley Smith Barney LLC |
| 2025-08-25 | Kang Sun | Officer, Director | 65,654 | 2025-08-21 | Morgan Stanley Smith Barney LLC |
| 2025-08-25 | Sandra Wallach | Officer | 28,390 | 2025-08-21 | Morgan Stanley Smith Barney LLC |
| 2025-05-23 | Constantin Ionel Stefan | Officer | 20,366 | 2025-05-21 | Morgan Stanley Smith Barney LLC |
| 2025-05-23 | Kang Sun | Officer, Director | 69,786 | 2025-05-21 | Morgan Stanley Smith Barney LLC |
| 2025-05-23 | Sandra Wallach | Officer | 27,595 | 2025-05-21 | Morgan Stanley Smith Barney LLC |
| 2025-02-24 | Sandra Wallach | Officer | 18,142 | 2025-02-21 | Morgan Stanley Smith Barney LLC |
| 2025-02-24 | Kang Sun | Director, Officer | 34,353 | 2025-02-21 | Morgan Stanley Smith Barney LLC |
| 2025-02-24 | Constantin Ionel Stefan | Officer | 9,066 | 2025-02-21 | Morgan Stanley Smith Barney LLC |
| 2025-02-24 | Jonathan Bornstein | Officer | 13,527 | 2025-02-21 | Morgan Stanley Smith Barney LLC |
| 2024-11-21 | JONATHAN G BORNSTEIN PHYLLIS BROCK TRUST | Officer | 15,000 | 2024-11-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-11-21 | Constantin Ionel Stefan | Officer | 8,575 | 2024-11-21 | Morgan Stanley Smith Barney LLC |
| 2024-11-21 | KANG SUN | Officer, Director | 33,779 | 2024-11-21 | Morgan Stanley Smith Barney LLC |
| 2024-11-21 | JONATHAN BORNSTEIN | Officer | 18,170 | 2024-11-21 | Morgan Stanley Smith Barney LLC |
| 2024-11-21 | SANDRA WALLACH | Officer | 17,158 | 2024-11-21 | Morgan Stanley Smith Barney LLC |
| 2024-11-20 | JONATHAN G BORNSTEIN PHYLLIS BROCK TRUST | Officer | 133,536 | 2024-11-20 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-11-12 | AMPRIUS, INC. | 10% Stockholder, Parent Company-Private Inc. | 379,240 | 2024-11-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-11-08 | AMPRIUS, INC. | 10% Stockholder, Parent Company-Private Inc. | 600,000 | 2024-11-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-11-07 | AMPRIUS, INC. | 10% Stockholder, Parent Company-Private Inc. | 40,386 | 2024-11-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-10-25 | MIRRO JUSTIN E | Former Director | 2,073,042 | 2024-10-24 | Cantor Fitzgerald |
| 2024-09-04 | Justin Mirro | Director | 450,000 | 2024-09-03 | Cantor Fitzgerald |
| 2024-09-03 | AMPRIUS, INC | 10% Stockholder | 1,500,000 | 2024-09-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-08-22 | Constantin Ionel Stefan | Officer | 8,800 | 2024-08-21 | Morgan Stanley Smith Barney LLC |
| 2024-08-22 | Jonathan Bornstein | Officer | 18,644 | 2024-08-21 | Morgan Stanley Smith Barney LLC |
| 2024-08-22 | KANG SUN | Officer | 33,333 | 2024-08-21 | Morgan Stanley Smith Barney LLC |
| 2024-08-22 | SANDRA WALLACH | Officer | 17,606 | 2024-08-21 | Morgan Stanley Smith Barney LLC |
| 2024-06-12 | MIRRO JUSTIN E | Director | 600,000 | 2024-06-12 | Cantor Fitzgerald |
| 2024-05-28 | KANG SUN | Officer | 35,584 | 2024-05-21 | Morgan Stanley Smith Barney LLC |
| 2024-05-28 | SANDRA WALLACH | Officer | 18,794 | 2024-05-21 | Morgan Stanley Smith Barney LLC |
| 2024-05-28 | JONATHAN BORNSTEIN | Officer | 19,902 | 2024-05-21 | Morgan Stanley Smith Barney LLC |
| 2024-05-28 | Constantin Ionel Stefan | Officer | 9,398 | 2024-05-21 | Morgan Stanley Smith Barney LLC |
| 2024-04-02 | JONATHAN BORNSTEIN | Officer | 125,983 | 2024-04-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2024-03-05 | JONATHAN BORNSTEIN | Officer | 150,000 | 2024-03-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Showing 1–50 of 62 filings